Flapping Transport

Tue Aug 1 19:30:13 UTC 2023

This is what they sent after my first ticket: 

We found this circuit was on a higher level DWDM circuit that was bouncing in and out of service until it self corrected and cleared on 7/5/2023 at 09:31:21pm EDT. The [redacted] transport team has identified a high speed circuit card failure in a transport node near Berea, IL (which doesn't exist) and has ordered a new one. Once it arrives, they will send out a MOP request via the [redacted] system to replace it during our maintenance window of 12am to 6am local time. 

----- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

----- Original Message -----

From: "Mel Beckman" <mel at beckman.org> 
To: "Mike Hammett" <nanog at ics-il.net>, "NANOG" <nanog at nanog.org> 
Sent: Tuesday, August 1, 2023 1:35:45 PM 
Subject: Re: Flapping Transport 

Ask them for an RFO report. They should be able to explain the diagnostics and reason for the original flapping. It's quite possible they found a problem somewhere on the path with a DWDM multiplexor or something. That wouldn't need any card replacement on your prem. 

-mel 

From: NANOG <nanog-bounces+mel=beckman.org at nanog.org> on behalf of Mike Hammett <nanog at ics-il.net> 
Sent: Tuesday, August 1, 2023 11:18 AM 
To: NANOG <nanog at nanog.org> 
Subject: Flapping Transport 

I have a wave transport vendor that suffered issues twice about ten days apart, causing my link to flap a bunch. I put in a ticket on the second set of occurrences. I was told that there was a card issue identified and would be notified when the replacement happened. Ticket closed. 

Three weeks later, I opened a new ticket asking for the status. The new card arrived the next day, but since no more flaps were happening, the card would not be replaced. Ticket closed. 

A) It doesn't seem like they actually did anything to fix the circuit. 
B) They admitted a problem and sent a new card. 
C) They later decided to not do anything. 

Is that normal? 
Is that acceptable? 

To avoid issues flapping causes, I disabled that circuit until repaired, but it seems like they're not going to do anything and I only know that because I asked. 

----- 
Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

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